9 10
1 1 1 1 0 4 4 4 0 0
1 1 1 1 0 4 4 4 5 5
0 0 0 0 0 0 0 0 5 5
2 2 1 1 0 0 0 0 5 5
2 2 1 1 6 6 6 6 0 0
2 2 1 1 6 6 6 6 7 7
0 0 0 0 6 6 6 6 7 7
3 3 3 3 0 0 7 7 7 7
3 3 3 3 0 0 7 7 7 7